import Vue from 'vue'
import VueRouter from 'vue-router'
import login from '../components/login.vue'
import home from '../components/home.vue'

Vue.use(VueRouter)

const routes = [{
    path: '/',
    redirect: '/login'
}, {
    path: '/login',
    component: login
}, {
    path: '/home',
    component: home
}]

const router = new VueRouter({
    routes
})

// 挂载路由导航守卫
router.beforeEach((to, from, next) => {
    // to 将要访问的路径
    // from 代表从哪个路径跳转而来
    // next 是一个函数，表示放行
    // next() 放行 next('/login) 强制跳转
    if (to.path === '/login') return next();
    // 获取token
    const tokenStr = window.sessionStorage.getItem('token');
    if (!tokenStr) return next('/login');
    next();
})
export default router